Make Kokoro label NoBlock while it isn't set up

Change-Id: I80fe4c107a5026c81a96c570ea2c2638e10c6293

project.config

diff --git a/project.config b/project.config
index e094b71..e287494 100644
--- a/project.config
+++ b/project.config
@@ -66,7 +66,7 @@
 	value = +1 Looks good to me, but someone else must approve
 	value = +2 Looks good to me, approved
 [label "Kokoro"]
-	function = AnyWithBlock
+	function = NoBlock
 	value = -1 Fails
 	value = 0 No score
 	value = +1 Verified